Sound-box for talking-machines.



No.-891,079. m'rnn'rnn JUNB161908.

. T. KRAEMERJ SOUND BOX FOR TALKING MAGHINES.-.

APPLICATION FILED JULY 15, 1907.

UNITED STATES PATENT FFI f THOMAS KRAEMER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HAWTHORNE &

SHEBLE.MANUFAOTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF PENNSYLVANIA.

Specification ofLetters Patent.

- Patented June 16, 1908.

Application filed m 16, 1907. Serial Ho. 388,721. 7

To all whom it may concern.

I Be it known that I, THoM'ns KRA'EMER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Sound-Boxes for Talkin Machines, of which the following is a speci cation.

The object of my invention is to adapt for use in connection with a phonograph record of the hill and valley type, a sound box of the character usually employed in connection with records of the lateral wave type. This object I attain in the manner hereinafter set forth, reference beinglhad to the accompanyirgdrawing, in whic igure 1 1s a face view of a sound box constructed in accordance with my present invention; Fig. 2 is an elevation of the same looking in the direction of the arrow 2:, Fig. 1 5 Fig. 3 is a section on the line a-a,' Fig. 1; Fig. 4 is a section on the line b-b, Fig. 1, and Fig. 5 is a view similar to Fig. 1, but illustrating a slight modification of the invention.

The cylindrical casing 1 of the sc und box is mounted upon the hollow arm 2 as usual,

and has supported within it, in the ordinary way, the diaphragm 3, the central portion of thls d1aphragm being secured to one arm of a bell crank lever 4 which is pivoted to an overhanging bracket 5, secured to the casing 1, the other arm of said lever 4 being connected, by a link 6, to one arm of the stylus lever 7, the latter being pivotally mounted upon the pointed ends of screws 9 which are carried by opposite members of a yoke 10 secured to the casing 1, of the sound box. (See Figs. 2 and The other arm of said stylus lever carries the stylus 12 which engages the groove of the record as shownin Fig. 1, so that,'as the record travels beneath said stylus, the stylus lever is caused tovibrate by reason of the hill and Valle conformation of the base of the groove, tiese vibrations being in the same plane as that of the dia hragm 3, but being transformed by the bel crank lever 4 into vibrations at a right angle to the plane of the diaphragm, thereby causing vibrations of the latter corresponding to the vibrations of the stylus lever. A spring 13 secured to the yoke 10 and bearing upon the.

stylus lever serves to maintain constant contact of the lever connections and of the bell crank lever and diaphragm.

Instead of using a link connection between the twolevers as shown in Fig. 3, I may, in some cases, cause the stylus lever to engage directly with the bell crank lever 4, as shown, for instance, in Fig. 5, the stylus lever 7 bein suitably bent or deflected for this purpose.

y reason of my invention, a sound box of the type usually em loyed m connection with recordshaving ateral Wave grooves is'readily adapted for use in connection with records having grooves of the hill and valley type.

.I claim:

1. The combination of a sound box, a vertically disposed dia hragm therein, a bearing fixed to said soun box, a bell crank lever attached to said diaphragm and pivotally mounted in said bearing to vibrate at a right angle to the plane of the diaphragm, another bearing fixed to said sound box and carrying pivots extending parallel with the axis of'the sound box and diaphragm, and a stylus lever carried by said pivots and connected to said bell crank lever to vibrate in a plane at a right angle to the axis of the sound box and diaphragm.

2. The combination of a sound box, a vertically disposed diaphragm therein, a bearing fixed to said sound box and projecting over the diaphragm, a bell crank lever attached to said diaphragm and pivotally mounted in said projecting bearing to vibrate at a right angle to the plane of the diaphragm, another bearing fixed to said sound box and carrying pivots extending parallel with the axis of the sound box and diaphragm, and a stylus lever carried by said pivots and connected to said bell crank lever to vibrate vertically in a plane at a right angle to the axis of the sound box and diaphragm.

3. The combination of a sound box, a vertically disposed diaphragm therein, a bearing fixed to said sound box, a bell crank lever attached to said diaphragm and pivotally mounted in said bearing to vibrate at a right angle to the plane of the diaphragm, another bearing fixed to said sound box and carrying pivots extending parallel with the axis of the sound box and diaphragm, a stylus lever carried-by said pivots and connected to said plane at'a right angle to the axis of the "sound" boxand diaphragm, and a spring carried by the bearing to which the stylus lever is pivoted, said spring acting upon the stylus lever to lift the same from the groove of the record.

4. The combination of a sound box, a vertically disposed diaphragm therein, a bearing fixed to said sound box, a bell crank lever attached to said diaphragm and pivotally mounted in said bearing to vibrate at a right angle to the plane of the diaphragm, another 10, hearing fixed to said sound box and provided with adjustable screw pivots extending parallel with the axis of the sound box and diaphragm'; and a stylus lever mounted upon said pivots and connected to said bell crank lever to vibrate vertically in a plane at a right angle to the axis of the sound box and diaphragm. p

5. The combination of a sound box, a vertically disposed diaphragm therein, a bearing fixed to said soundbox and'proje'cting over said diaphragm, a bell crank lever attached to said diaphragm and pivotally mounted in said projecting bearing to vibrate at a right angle to the plane of the diaphragm, another right angle to the axis of the sound box and-- diaphragm.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

-IHOMAS KRAEMER;

l/Vitnesses HAMILTON D. TURNER, .KATE A. BEADLE. 

